There have been many a good alternate earth story over the last three decades at DC and Marvel, but when the ingrained attitude is that these places and characters are there for cannon fodder and disposable the concept becomes hard to invest any of ones time and interest in. Dark Nights here is about the best example of this nihilistic view as is possible to find.

That's what I liked about Multiversity ... for once none of the characters were from the main DC Earth, and all were taken as credible heroes in their own right.

I absolutely agree. I loved Multiversity. Very much underrated series.